Police say an employee of a local business was approaching a device there to make a night deposit.
That's when, investigators say, two men jumped from the roof, landed near the 51-year-old woman, and robbed her. Police say one man assaulted the victim while the other took the deposit bag.
Both fled the scene on foot toward the Driftwood Club Apartments.
Anyone with information is asked to call investigators at 302-834-2630 ext. 6 or Crime Stoppers at 1-800-TIP-3333.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.